Certificate pursuant to section 12 of the Weights and Measures Act 1985 ... the Secretary of State [for Trade and Industry] hereby certifies as suitable for use for trade the following pattern of liquid measuring instrument as described on the attached continuation sheets ... submitted by Ferranti plc.
Great Britain.Department of Trade and Industry.
National Weights and Measures Laboratory.
Ferranti PLC.
Teddington : National Weights and Measures Laboratory,
1987.
Weights and measures
Liquid feeders.